package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
//对注册参数进行合法性校验的注解
@Validated
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
//    对传入的username和password进行合法性校验
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
           //查询用户
           User u = userService.findByUserName(username);
           if(u==null){
//            没占用
//            注册
               userService.register(username,password);
               return Result.success();
           }else {
//            已经占用了
               return Result.error("用户名已经被占用");
           }
    }


    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
        //根据用户名查询用户
        User loginUser = userService.findByUserName(username);
        //判断该用户是否存在
        if(loginUser==null){
            return Result.error("用户名错误");
        }
//        判断密码是否正确 loginUser对象中的密码是密文的,
//        将登录的密码转换为密文然后与数据库中的用户密码密文进行比较
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);

//            把token存储到redis中
//            如果用户重新登录，生成的新令牌会替换掉redis中的旧令牌，所以不需要去比较两块令牌是否相等因为他俩一定相同
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set("token",token,12, TimeUnit.HOURS);

            return Result.success(token);
        }
        return Result.error("密码错误");
    }


//    @GetMapping("/userInfo")
//    public Result<User> userInfo(@RequestHeader(name = "Authorization") String token){
////根据用户名查询用户
//        Map<String, Object> map = JwtUtil.parseToken(token);
//        String username = (String) map.get("username");
//        User user = userService.findByUserName(username);
//        return Result.success(user);
//    }
@GetMapping("/userInfo")
public Result<User> userInfo(/*@RequestHeader(name = "Authorization") String token*/){
//根据用户名查询用户
//    Map<String, Object> map = JwtUtil.parseToken(token);
//    String username = (String) map.get("username");

    Map<String,Object> map = ThreadLocalUtil.get();
    String username = (String) map.get("username");


    User user = userService.findByUserName(username);
    return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
//        校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }
//        原密码是否正确
//        调用userService根据用户名拿到原密码，再和oldPwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        if(!user.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }
//        newPwd和rePwd是否一样
        if(!newPwd.equals(rePwd)){
            return Result.error("两次填写的新密码不一样");
        }
//        调用service完成密码更新
        userService.updatePwd(newPwd);
//        删除redis中对应的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete("token");
        return Result.success();
    }
}
